Sweet Grass, Hierochloe odorata

Sweet Grass is an aromatic cool season grass with long soft leaves that grows 30 to 60 cm tall. Its beautiful fragrance reminds of vanilla.
In ideal conditions it spreads by rhizomes.

Growing conditions:

Requires full to part sun and medium to moist soil. Adaptable to soil conditions.

It is a sacred grass of Indigenous peoples and is used ceremonially.
Sweetgrass contains phytol and coumarin, two chemicals that are known to repel mosquitoes. I highly recommend reading the book "Braiding Sweetgrass" from Robin Wall Kimmerer.